freemarker中的directive

//加载自定义标签，主要是在html的模班页面使用，在freemarkerUtil中的initCfg()方法中

freemarkerCfg.setSharedVariable("demo", new DemoDirective());

//客服

freemarkerCfg.setSharedVariable("custList", new CustServiceDirective());

public class CustServiceDirective extends BaseDirective implements TemplateDirectiveModel{
private StoreCustServiceService storeCustServiceService;
public CustServiceDirective(){
init("storeCustServiceService");//主要是用于调用service中的逻辑处理方法
}
@Override
public void execute(Environment env, Map params, TemplateModel[] loopVars,
TemplateDirectiveBody body) throws TemplateException, IOException {
StoreCustService storeCustService=new StoreCustService();
String traAgId = getParam(params, "traAgId");//获取参数的操作
if (traAgId != null) {
storeCustService.setTraAgId(Integer.parseInt(traAgId));
}
String status= getParam(params, "status");
if(status!=null){
storeCustService.setStatus(Integer.parseInt(status));
}
Writer out=env.getOut();
if(body!=null){
//设置循环变量
if(loopVars !=null && loopVars.length>0){
List custList=storeCustServiceService.findCustList(storeCustService," sequence ", "true".equals(getParam(params,"cache"))?true:false);//获取到需要的list
if(custList!=null && custList.size()>0){//循环输出
for (int i = 0; i<custList.size(); i++) {
loopVars[0]=new BeanModel(custList.get(i), new BeansWrapper());
if(loopVars.length>1){
loopVars[1]=new SimpleNumber(i);
}
body.render(out);
}

}
}
}

}

}

 继承的BaseDirective的写法

/**
* <p>
* Description: 自定义标签共同的功能
* </p>
*/
public class BaseDirective extends Base {

/**
* 获得参数
*
* @param params
* @param name
* @return
*/
public String getParam(Map params, String name) {
String value = "";
if (params.get(name) != null
&& params.get(name).toString().length() > 0) {
value = params.get(name).toString();
}
return value;
}

/**
* 获得参数并传递默认值
*
* @param params
* @param name
* @param defaultValue
* @return
*/
public String getParam(Map params, String name, String defaultValue) {
String value = defaultValue;
if (params.get(name) != null
&& params.get(name).toString().length() > 0) {
value = params.get(name).toString();
}
return value;
}

/**
* 获得int参数并传递默认值
*
* @param params
* @param name
* @param defaultValue
* @return
*/
public int getParamInt(Map params, String name, int defaultValue) {
int value = defaultValue;
if (params.get(name) != null
&& params.get(name).toString().length() > 0) {
try {
value = Integer.parseInt(params.get(name).toString());
} catch (Exception e) {
}
}
return value;
}

/**
* 获得数据
*
* @param params
* @param name
* @return
* @throws TemplateModelException
*/
public String getData(Environment env, String name)
throws TemplateModelException {
String value = "";
if (env.getDataModel().get(name) != null
&& env.getDataModel().get(name).toString().length() > 0) {
value = env.getDataModel().get(name).toString();
}
return value;
}

/**
* 获得数据并传递默认值
*
* @param params
* @param name
* @param defaultValue
* @return
* @throws TemplateModelException
*/
public String getData(Environment env, String name, String defaultValue)
throws TemplateModelException {
String value = defaultValue;
if (env.getDataModel().get(name) != null
&& env.getDataModel().get(name).toString().length() > 0) {
value = env.getDataModel().get(name).toString();
}
return value;
}
}

 在html页面的应用

<@custList traAgId="${traAgId}" status="1";cuList>//status是参数，cuList是循环变量
<li>
<#if cuList.gender??>
<#if cuList.gender== 1>
<div class="avatar"><img width="65" height="66" src="../img/ta/men_100X100.jpg"></div>
<#elseif cuList.gender== 2>
<div class="avatar"><img width="65" height="66" src="../img/ta/woman_100X100.jpg"></div>
</#if>
</#if>

<p class="s14">${cuList.realName}</p>
<div class="i_onlinecs_btnc c_b">

<a href="tencent://message/?uin=${cuList.qq}&site=www.xx.com&menu=yes" target="_blank" rel="nofollow">
<img src="http://wpa.qq.com/pa?p=1:${cuList.qq}:4" border="0" align="bottom" class="pic"></a>
</div>
</li>
</@custList>

 还有一种循环方法

if(body!=null){
//设置循环变量
if(loopVars !=null && loopVars.length>0){
List<TravelAgency> travelList=travelAgencyService.find(travelAgency, order,limit);
loopVars[0]=new ArrayModel(travelList.toArray(), new BeansWrapper());
body.render(out);

}
}

 在html中就是，这种写法能判断是否有值，可以针对这个做处理

<@travelList cityCode="${cityCode}" limit="0,10";traList>
<#if traList?exists && traList?size != 0>
<#list traList as trList>
<dl>
<dd><a href="${contextPath}www/store.do?traAgCode=${trList.traAgCode?default('')}">${trList.companyInfo.companyName!""}</a></dd>
</dl>
</#list>
<#else>
<dl>
<dd>暂时没有旅行社添加！</dd>
</dl>

</#if>
</@travelList>

 还有一种多参数的做法

效果如图

 

//多个循环变量的情况以及涉及到freemarker的分页做法
public class TailPageDirective  extends  BaseDirective implements TemplateDirectiveModel{
public TailPageDirective(){
init("tailProService");
}
@Override
public void execute(Environment env, Map params, TemplateModel[] loopVars,
TemplateDirectiveBody body) throws TemplateException, IOException {
if(body!=null){
//设置循环变量
if(loopVars !=null && loopVars.length>0){
String orderby=getParam(params, "orderby"," used desc");
//显示数量
int row=getParamInt(params, "row", 10);//给参数的默认值
//标题长度
int titleLen=getParamInt(params, "titleLen",0);
//当前第几页
int page=getParamInt(params, "page", 1);

String action=getParam(params, "action");

HashMap<String, String> paramMap=new HashMap<String, String>();
if(tailPromotion==null){
tailPromotion=new TailPromotion();
}

String cityCode = getParam(params, "cityCode");
if (StringUtil.isNotEmpty(cityCode)) {
tailPromotion.setDepartCityCode(cityCode);
}

tailPromotion.setTrStatus(0);
tailPromotion.setStatus(Byte.valueOf("3"));
String transportMeans=getParam(params, "transportMeans");//获取的是标签内传递的参数
//env.getDataModel().get("transportMeans")获取的是地址栏中的参数				if(env.getDataModel().get("transportMeans")!=null && env.getDataModel().get("transportMeans").toString()!=""){
transportMeans=env.getDataModel().get("transportMeans").toString();
tailPromotion.setTransportMeans(transportMeans);
paramMap.put("transportMeans", transportMeans);
action=action+"&transportMeans="+transportMeans;
}else if(StringUtils.isNotEmpty(transportMeans)){
tailPromotion.setTransportMeans(transportMeans);

paramMap.put("transportMeans", transportMeans);

action=action+"&transportMeans="+transportMeans;

}

//升降序的做法
String order =" sequence ";
String sequence=getParam(params, "sequence");
if(env.getDataModel().get("sequence")!=null && env.getDataModel().get("sequence").toString()!=""){

sequence =env.getDataModel().get("sequence").toString();

if("1".equals(sequence)){

order=" lowest_price desc ";

}else if("2".equals(sequence)){

order=" lowest_price ";

}

paramMap.put("sequence", sequence);

action=action+"&sequence="+sequence;

}else if(StringUtils.isNotEmpty(sequence)){

if("1".equals(sequence)){

order=" lowest_price desc ";

}else if("2".equals(sequence)){

order=" lowest_price ";

}
paramMap.put("sequence", sequence);

action=action+"&sequence="+sequence;

}
int count=tailProService.countByExample(tailPromotion);
FreemarkerPager pager=new FreemarkerPager();//分页的做法
pager.setCurrPage(page);
pager.setTotalCount(count);
pager.setPageSize(row);
pager.setAction(action);
paramMap.put("tcount", String.valueOf(count));
pager.setParams(paramMap);

List<TailPromotion> trpList=tailProService.findTP(tailPromotion,orderby,page, row);
//这个是ajax的做法
TreeMap<Integer, Integer> daysMap=new TreeMap<Integer, Integer>();//旅游天数
HashMap trPropertyMap=new HashMap();//团的属性
TreeMap<Integer, String> priceMap=new TreeMap<Integer, String>();//价格
if(trpList!=null && trpList.size()>0){
for(int i=0;i<trpList.size();i++){
Integer day=trpList.get(i).getTourDays();
if(day!=null && day!=0){
daysMap.put(day,day);
}
Byte trPro=trpList.get(i).getTrProperty();
if(trPro!=null){
trPropertyMap.put(trPro, trPro);
}
Integer lowPrice=trpList.get(i).getLowestPrice();
if(lowPrice!=null && lowPrice!=0){
if(lowPrice<100){
priceMap.put(100, "100元以下");
}else if(lowPrice>100 && lowPrice<=300){
priceMap.put(300, "100-300元");
}else if(lowPrice>300 && lowPrice<=500){
priceMap.put(500, "300-500元");
}
}

}
}

//搜索条件 放到map里面
Map<String,Map> sMap=new HashMap<String,Map>();

sMap.put("daysMap", daysMap);

sMap.put("trPropertyMap", trPropertyMap);

sMap.put("priceMap", priceMap);

if(loopVars.length==1){
loopVars[0]=new MapModel(sMap,new BeansWrapper());
}else if(loopVars.length==3){
loopVars[0]=new ArrayModel(trpList.toArray(),new BeansWrapper());
loopVars[1]=new BeanModel(pager,new BeansWrapper());
loopVars[2]=new MapModel(sMap,new BeansWrapper());
}

body.render(env.getOut());

}

}
}

}

 在html页面中

<@tailPage  row='10' page='${page!1}' istheme='0' proType="1" cityCode="${cityCode?if_exists}" action='${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html'  ;trpList,pager,sMap><!-- 含有多个循环变量的-->
<!--  搜索区  -->
<div class="dec_box">
<#if sMap.get('daysMap')?size != 0>
<#assign daysMap = sMap.get('daysMap')>
<dl>
<dt>行程天数：</dt>
<dd>
<#list daysMap.keySet() as key>
<a href="${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html&days=${key}<#if (price??)>&price=${price}</#if><#if (topicLabels??)>&topicLabels=${topicLabels}</#if><#if (sequence??)>&sequence=${sequence}</#if><#if (ptaNames??)>&ptaNames=${ptaNames}</#if><#if (trProperty??  && trProperty!='')>&trProperty=${trProperty}</#if><#if (transportMeans?? && transportMeans!='')>&transportMeans=${transportMeans}</#if>" class="<#if ((days!'') == key?string)>active</#if>" >${key}日游</a>
</#list>
</dd>
</dl>
</#if>
<#if sMap.get('priceMap')?size != 0>
<#assign priceMap = sMap.get('priceMap')>
<dl>
<dt>价格范围：</dt>
<dd>
<#list priceMap.keySet() as key>
<a href="${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html&price=${key?c}<#if (days??)>&days=${days}</#if><#if (topicLabels??)>&topicLabels=${topicLabels}</#if><#if (sequence??)>&sequence=${sequence}</#if><#if (ptaNames??)>&ptaNames=${ptaNames}</#if><#if (trProperty??  && trProperty!='')>&trProperty=${trProperty}</#if><#if (transportMeans?? && transportMeans!='')>&transportMeans=${transportMeans}</#if>" class="<#if ((price!'') == key?c)>active</#if>" >${priceMap.get(key)}</a>
</#list>
</dd>
</dl>
</#if>

</div>

</div>

<div class="search_sum">
<strong class="s18 c_c">${cityName?if_exists}<#if (ptaNames??)>到${ptaNames}旅游 </#if> <#if (days??)>${days}日游</#if></strong>
共找到 <strong id="tCount" class="c_o"></strong> 条线路</div>

</div>

<div class="d_wrap selfclear">

<div class="d_r">

<div class="d_m dec_m">

<!-- 搜索结果 -->
<div class="dec_box selfclear">

<div class="search_sort">
<span class="active">默认排序</span>
<span>
<a href="${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html&sequence=1<#if (topicLabels??)>&topicLabels=${topicLabels}</#if><#if (days??)>&days=${days}</#if><#if (price??)>&price=${price}</#if><#if (sequence??)>&sequence=${sequence}</#if><#if (ptaNames??)>&ptaNames=${ptaNames}</#if><#if (trProperty??  && trProperty!='')>&trProperty=${trProperty}</#if><#if (transportMeans?? && transportMeans!='')>&transportMeans=${transportMeans}</#if>">价格 <em class="icon_sort up"></em></a>&nbsp;
<a href="${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html&sequence=2<#if (topicLabels??)>&topicLabels=${topicLabels}</#if><#if (days??)>&days=${days}</#if><#if (price??)>&price=${price}</#if><#if (sequence??)>&sequence=${sequence}</#if><#if (ptaNames??)>&ptaNames=${ptaNames}</#if><#if (trProperty??  && trProperty!='')>&trProperty=${trProperty}</#if><#if (transportMeans?? && transportMeans!='')>&transportMeans=${transportMeans}</#if>">价格<em class="icon_sort down"></em></a>
</span>
<form name="form1" method="post" action="" >
<script type="text/javascript">
function form1Submit(){
var action="${contextPath}zhoubian.do?cityCode=${cityCode}&cityName=${cityName}&templetPath=index_zb_wd_so.html&sequence=1<#if (topicLabels??)>&topicLabels=${topicLabels}</#if><#if (days??)>&days=${days}</#if><#if (price??)>&price=${price}</#if><#if (sequence??)>&sequence=${sequence}</#if><#if (ptaNames??)>&ptaNames=${ptaNames}</#if>";

var trProperty=$.trim($("#trProperty").val());

if(trProperty!=''){

action=action+"&trProperty="+trProperty;

}else{}

var transportMeans=$.trim($("#transportMeans").val());

if(transportMeans!=''){

action=action+"&transportMeans="+transportMeans;

}else{}

form1.action=action;

form1.submit();
}
</script>
<span>&nbsp;
<select name="trProperty" id="trProperty" onchange="javascript:form1Submit();">
<option value=''>出游方式</option>
<option value='1' <#if ((trProperty!'') == '1')>selected="selected"</#if> >跟团游</option>
<option value='2' <#if ((trProperty!'') == '2')>selected="selected"</#if> >自由行</option>
<option value='3' <#if ((trProperty!'') == '3')>selected="selected"</#if> >自驾游</option>
<option value='4' <#if ((trProperty!'') == '4')>selected="selected"</#if> >独立包团</option>
</select>
</span>
<span>&nbsp;
<select name="transportMeans" id="transportMeans"  onchange="javascript:form1Submit();">
<option value=''>交通工具</option>
<option value="飞机" <#if ((transportMeans!'') == '飞机')>selected="selected"</#if>>飞机</option>
<option value="火车" <#if ((transportMeans!'') == '火车')>selected="selected"</#if>>火车</option>
<option value="汽车" <#if ((transportMeans!'') == '汽车')>selected="selected"</#if>>汽车</option>
<option value="轮船" <#if ((transportMeans!'') == '轮船')>selected="selected"</#if>>轮船</option>
<option value="动车" <#if ((transportMeans!'') == '动车')>selected="selected"</#if>>动车</option>
<option value="高铁" <#if ((transportMeans!'') == '高铁')>selected="selected"</#if>>高铁</option>
</select>
</span>
</form>
</div>

<div class="search_c" style="display:block">
<#list trpList as tour>
<div class="search_route_c">
<div class="g_pic"><a href="${tour.url!''}" target="_blank"><img src="${tour.picturePath!'/img/ta/whitelogo.jpg'}"></a></div>
<div class="search_route_op">
￥<strong class="s24 c_c">${tour.lowestPrice!''}</strong>起
<a href="${tour.url!''}" target="_blank"><div class="search_c_goto">去看看</div></a>
</div>
<h3><a href="${tour.url!''}"  target="_blank" class="c_c">${tour.trName!''}</a></h3>
<p><span class="c_lgray">行程概览: </span><span class="c_o">${tour.passedTourAttrNames!'暂无行程'}</span></p>
<p><span class="c_lgray">往返交通: </span><span class="dec_mr">${tour.transportMeans!''}</span><span class="c_lgray">服务承诺：</span>
<#if (tour.extracomsuption??)>
<span class="c_g">
<#if (tour.extracomsuption == 1)>
无购物无自费
<#elseif (tour.extracomsuption == 2)>
无购物有自费
<#elseif (tour.extracomsuption == 3)>
有购物无自费
<#elseif (tour.extracomsuption == 4)>
有购物有自费
</#if>
</span>
</#if>
</p>
<p>${tour.companyName!''}</p>
</div>
</#list>
</div>

<div class="search_c">
<div class="g_loading"></div>
</div>

</div>
<div class="g_page">
${pager.formPageStr}
</div>
</div>
</@tailPage>